Celestron 44100 Gebruiksaanwijzing - Pagina 12

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Adjusting the Lighting

Specimens of different size, thickness, and color variations will require different levels of illumination. There are two ways

to change the amount of illumination when viewing a specimen; adjusting the Abbe condenser and adjusting the iris

diaphragm (see Figure 3f):

1. When viewing with lower power (4x and 10x) objective lenses you will need to lower the condenser lens in order to

spread the light over the larger field of view. To change the position of the condenser, simply rotate the condenser

regulator knob clockwise until the beam of light spreads wide enough to illuminate the entire field of view when

viewing.

2. As you lower the condenser to spread out the light or change to a higher power objective lens, your image will appear

dimmer. Open the aperture of the iris diaphragm to let in more light. Opening and closing the diaphragm will give

a relief view of the specimen and allow you to change the depth of field of the specimen being viewed.

Using a Filter

To bring out different levels of detail, experiment with changing the color of the back lighting of the specimen. To change

the lighting color, place the blue filter in the light path by placing it on the top of the electric illuminator. You may need to

refocus by adjusting the fine focus knob (11) slightly for best viewing.

Replacing the Electric Illuminator Bulb

Thumbscrew

Figure 3g

To replace a burned out bulb, do the following:

1. Take out the thumbscrew on the

illuminator by turning it counter

clockwise.

2. Open the compartment and you will s

the 20 watt tungsten bulb.

3. Remove the bulb by pressing lightly

down on the bulb and rotate it counter

clockwise and it will come out.

4. Take the new bulb and line up the pins

of the bulb with the slots in the bulb

socket and then push it down and rotate

clockwise until it sets in place.

5. Close the compartment, line up the

.threaded hole for the thumbscrew and

tighten it by turning clockwise.